Fluorapatite and Goethite Physical Properties

Fluorapatite

Goethite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.1-3.254.27-4.29

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

1.6 Cleavage

Indistinct

Perfect {010}

1.7 Mohs Hardness

55-5.5

2 10

1.8 Chemical Composition

Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)

FeO(OH)Arthur Thomas , Gemstones (2009)

Fluorapatite and Goethite Chemical Formula

While comparing Fluorapatite and Goethite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Fluorapatite and Goethite chemical formula.

Chemical formula of Fluorapatite- Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Fluorapatite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fluorapatite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fluorapatite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Fluorapatite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.